The Institute of Fiscal Studies has helpfully done an analysis of the manifesto proposals of the main parties (see here). The graph below is their analysis of how current Conservative plans will influence the income of people in different parts of the income distribution. It shows, the richest 10% just about managing, while the poorest 10% loose 9% of their income.
The manifesto does nothing to address this – not what you might expect from the claim on page 9 to “abhor social division, injustice, unfairness, and inequality.” But then, what politicians say is one thing, what they do is another.
In the interest of balance, I should add that the next page of the IFS report shows that Labour is better but could have gone much further (see here). The case for a progressive spend and tax policy is strong. For evidence, have a look at Sweden.